I have a number of old CD/DVD players and would like to use them as test signal sources. The idea is to generate signals in software and save to the CD as a WAV files. Then I can select ready-made signals without having to set up arb gens etc. I would use only one channel.
However, there is not alot of height or spare room inside the players so I need a minimalist approach for a mono amp and its power supply.
I am looking for around 10W into 4 ohms. Being repetitive signals, fidelity is not such an issue. Of course, the amp's input would be line level from the playe'rs ordinary output.
Perhaps I could manage with a single transistor?
For the power supply, I was thinking to remove the board from a 12V 1A SMPS wall adaptor.
Could anyone please offer their comments or suggestions along these lines?
Louis Merton